CommenterUserpicAsset
This template tag is a container tag that puts the current commenter's userpic asset in context. Because userpics are stored as assets within Movable Type, this allows you to utilize all of the asset-related template tags when displaying a user's userpic.
Example:
<mt:CommenterUserpicAsset> <img src="<$mt:AssetThumbnailURL width="20" height="20"$>" width="20" height="20" /> </mt:CommenterUserpicAsset>